A Historic Kona Low Forced the First System-Wide UH Closure Since the Pandemic -- Every Oahu Campus Shut Down for Flash Floods
·HI·floodingemergency notificationhigh confidence
Confirmed Threat
On April 10, 2026, a powerful Kona low pressure system generated historic rainfall across Oahu, prompting Governor Josh Green to close all state government offices and the University of Hawaii system to close all Oahu campuses and facilities, including UH Manoa, UH West Oahu, Kapiolani Community College, Honolulu Community College, Leeward Community College, Windward Community College, and Hawaii Pacific University facilities. Residents were strongly discouraged from traveling unless absolutely necessary.
Alerts
3
Response
—
Killed
0
Injured
0
Institution
University of Hawaii System
Public R1 · HI
~50,000 studentsUH RAVE Alert / UH Emergency
Confirmed Timeline
Alert Sequence
3 messages in sequence
Some alert texts below are approximate reconstructions from news coverage, not confirmed verbatim transcripts. Reconstructed texts are shown in italic with a dashed border. Verified verbatim texts have a solid border and are marked accordingly.
INITIAL ALERTEmail
Approximate reconstruction·485 chars
UH System Notice: All University of Hawaii campuses and facilities on Oahu are CLOSED on Friday, April 10, 2026. This includes UH Manoa, UH West Oahu, UH Hilo (Oahu sites), Kapiolani CC, Honolulu CC, Leeward CC, and Windward CC. Maui County and Hawaii County UH campuses are on standby. Do not travel to campus. The National Weather Service has forecast heavy rain, flash flooding, and potentially damaging winds beginning before dawn. Monitor hawaii.edu and your UH email for updates.
This text has been reconstructed from news coverage and may not reflect the exact original wording.
The UH System closure announcement was published the evening of April 9 in advance of forecast severe weather to allow commuters and students to plan
This was the first UH system-wide closure for weather since COVID-era operations; the scope (all Oahu UH campuses plus standby for outer islands) reflected the severity of the forecast
Governor Josh Green simultaneously announced closure of all Oahu state government offices for April 10, coordinating with UH's decision
UPDATEPush
Approximate reconstruction·280 chars
UH RAVE Alert: Flash Flood Warning in effect for Oahu. All UH Oahu campuses remain CLOSED. Do not attempt to drive through flooded roadways. Seek higher ground if in a low-lying area. NWS has issued warnings through midday. Continue to monitor weather conditions before traveling.
This text has been reconstructed from news coverage and may not reflect the exact original wording.
The National Weather Service Honolulu issued flash flood warnings for Oahu on April 10 as the Kona low produced intense rainfall
UH Manoa's Manoa Valley is particularly flood-prone; flash flooding there had occurred in March 2026 as well, during a separate historic rainfall event
The April 10 event followed a March 2026 flooding episode at Manoa that UH officials had cited as evidence of increased extreme weather frequency
ALL CLEAREmail
Approximate reconstruction·327 chars
UH System Update: Oahu campuses will reopen Monday, April 14. Maui County and Hawaii Island UH campuses resume normal operations. Please check for any building or facility closures related to weather damage before returning. All employees and students should monitor hawaii.edu for any specific campus updates over the weekend.
This text has been reconstructed from news coverage and may not reflect the exact original wording.
Campuses remained closed on the Friday of the storm; the extended weekend (April 11-13) allowed for damage assessment before a Monday reopening
Maui and Hawaii Island campuses had been on standby, not full closure, reflecting the geographically targeted nature of the Kona low's impacts on Oahu
Widespread road closures across Oahu on April 10 would have made commuting to campus dangerous even had buildings been open
Context
Background
On April 10, 2026, a stationary Kona low pressure system -- a cold upper-level low that forms near Hawaii in winter and spring -- produced historic rainfall on Oahu, triggering flash flood warnings from the National Weather Service Honolulu. Governor Josh Green announced the closure of all Oahu state offices and the University of Hawaii System closed all Oahu campuses and facilities, placing Maui County and Hawaii Island campuses on standby. The system-wide closure encompassed UH Manoa, UH West Oahu, Kapiolani Community College, Honolulu Community College, Leeward Community College, and Windward Community College. The April 2026 Kona low followed a March 2026 atmospheric river event that had already inundated Manoa Valley with what researchers later estimated as two trillion gallons of rainfall across Hawaii -- making spring 2026 one of the wettest stretches in decades. KITV reporting confirmed the closure alongside school and government shutdowns across the island. The UH System closure is documented as one of the first weather-triggered system-wide closures since the COVID-19 pandemic disruptions, illustrating how climate-related extreme weather is increasingly forcing coordinated higher-education emergency responses in Hawaii.
Analysis
Key Findings
01This was the first UH System-wide weather-closure since the COVID-19 pandemic, coordinated with the Governor's office-wide Oahu shutdown
02The April 2026 Kona low was part of a pattern of extreme rainfall events in Hawaii -- the second major flooding episode within six weeks after a historic March 2026 atmospheric river
03All seven Oahu UH institutions (four-year and community colleges) were simultaneously closed, reflecting the scale and geographic targeting of the Kona low's impact
04The event reinforces the archive's documentation that Hawaiian institution emergency alerts are increasingly driven by weather extremes rather than security incidents
Outcome
No UH campus fatalities reported. All Oahu UH campuses and facilities closed for the day. Maui and Hawaii Island UH campuses placed on standby. Widespread flooding, road closures, and power outages occurred across Oahu. Campuses reopened Monday, April 13.